Update default version sanitization regex to match PEP386/440

PEP 356 defining accepted version scheme is in status Accepted so I
think this is enough to use it as a default.

http://www.python.org/dev/peps/pep-0386/#the-new-versioning-algorithm
http://www.python.org/dev/peps/pep-0440/
Fix invalid commit call in LDAP user creation
Do not re-fetch user while creating it
Consider LDAP created users as local as well
Tell exactly which user was created